High shaft forming fabrics

Abstract

A paper making composite forming fabric including paper side weft and warp yarns and wear side warp yarns and bindery yarns. The paper side wefts and the binder yarns being interwoven with the paper side warp yarns. The binder yarns being interwoven with the wear side warps. A total number of paper side and wear side warp yarns per weave repeat is greater than 24. An internal binder float length is between 2 and 4. The fabric has an interchange points percentage value of less than 20 and a binder interchange points as a percentage of total machine direction yarns value of less than 10.

1. Paper making composite forming fabric comprising paper side weft and warp yarns, wear side warp yarns and binder yarns, the paper side wefts and the binder yarns being interwoven with the paper side warp yarns, the binder yarns being interwoven with the wear side warps, a total number of paper side and wear side warp yarns per weave repeat is greater than 24, an internal binder float length is between 2 and 4, the fabric having fewer than 0.20 binder yarn pair interchanges for the number of paper side warp yarns in each weave repeat and fewer than 0.10 binder yarn pair interchanges for the total of machine direction yarn in each weave repeat. 
   
   
     2. Paper making composite forming fabric according to  claim 1 , wherein the total number of paper side and wear side warp yarns per repeat is one of 28, 32, 40, 48, and 100. 
   
   
     3. Paper making composite forming fabric according to  claim 1 , wherein the fabric further comprises wear side weft yarns which are interwoven with the wear side warp yarns. 
   
   
     4. Paper making composite forming fabric according to  claim 1 , wherein the binder yams are disposed in pairs and form an integral part of the paper side weave pattern. 
   
   
     5. Paper making composite forming fabric according to  claim 1 , wherein the number of paper side warp yarns and the number of wear side warp yarns is the same. 
   
   
     6. Paper making composite forming fabric according to  claim 1 , wherein at least one binder yarn is defining a stiffening section, wherein the binder yarn floats under at least two consecutive warp yarns of a fabric layer and binds on each end of the stiffening section with a warp yarn of the same layer. 
   
   
     7. Paper making composite forming fabric according to  claim 1 , wherein a binder knuckle on the wear side fabric is bordered on both sides by adjacent wear side warp yarns interlacing with wear side weft yarns. 
   
   
     8. Paper making composite forming fabric according to  claim 1 , wherein interchange points percentage, which is the number of binder interchanges divided by the number of paper side warp yarns multiplied by 100, is less than 15. 
   
   
     9. Paper making composite forming fabric according to  claim 1 , wherein paper side to wear side weave repeat ratio, which is the number of repeats on the paper side per weave repeat divided by the number of repeats on the wear side per weave repeat, is greater than 3. 
   
   
     10. Paper making composite forming fabric according to  claim 1 , wherein binder interchange points as percentage of the total number of MD yarns per weave repeat is less than 8.3. 
   
   
     11. Paper making composite forming fabric according to  claim 1 , wherein wear side fabric MD-CD yam interlacing divided by the number of wear side warp yarns per weave repeat multiplied with 100 is less than 15. 
   
   
     12. Paper making composite forming fabric according to  claim 1 , wherein the fabric is manufactured by using at least one of a Jacquard and a dobby mechanism. 
   
   
     13. Paper making composite forming fabric according to  claim 1 , wherein the warp yams are not drawn-in sequentially from a first frame to a last frame of a weaving loom. 
   
   
     14. Paper making composite forming fabric according to  claim 1 , wherein for a weave repeat using N frames, warp yarns 1 to N/2 are drawn-in in sequence from frame 1 to frame N/2 and warp yarns N/2+1 to N are drawn-in reversed order from frame N to N/2+1. 
   
   
     15. Paper making composite forming fabric according to  claim 1 , wherein interchange points percentage, which is the number of binder interchanges divided by the number of paper side warp yarns multiplied by 100, is between 14.3 and 4. 
   
   
     16. Paper making composite forming fabric according to  claim 1 , wherein the total number of paper side and wear side warp yams per repeat is one of 40, 48 and 100.